チキソトロピー性物質を用いたパッシブ・アダプティブ振動制御要素の検討

概要

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Adaptive vibration control is necessary to solve vibration problems, especially problems with nonstable excitation forces. Adaptive vibration control is a method that changes vibration system characteristics depending on the excitation force or vibration level. Adaptive vibration control elements are generally constructed by using actuators and controllers. These elements require external energy to change their characteristics. Elements using less external energy are more desirable. To construct adaptive vibration control elements which do not require any external energy, we propose a method that uses thixotropic materials. Thixotropic materials are substaces which liquefy when stirred or shaken and return to the hardened state upon standing. It may be possible to construct elements which change their characteristics passively depending on the vibration level. We construct vibration control elements containing thixotropic materials and conduct experiments with them. The results show that a vibration system with thixotropic material changes its vibration characteristics, the natural frequency and the damping ratio, according to the amplitude of the excitation force. We also show that the element is effective in solving vibration problems with nonstable excitation frequency.
社団法人日本機械学会の論文
1995-08-25